You can use anything you want for park. Doesn't mean it'll perform well. A stiff, heavy all mountain board makes for a clunky and clumsy ride in the park. But you can still use it yeah. It'll be harder to press, though it may give you some great pop. Maybe harder to air out of things, and to spin. Less forgiving on the sketchy landings. But yeah you could use it.

look more for a freestyle all mountain as opposed to freeride, and you'll be more pleased with the performance